I've noticed that many excellent early aviation modelers choose brass colored instrument face rings when modeling their instrument panels. On the other hand, the few photos I find of instrument panels seem to show the instrument rings in black or aluminum color. Color photos of the Memorial Flight Association's restoration of an original C.VI has black instrument rings, and I suspect they are aluminum.
So, my question to the experts is, were the instrument face rings on early aeroplanes brass, or aluminum?
